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Flow Transitions (reduction/expansion)

Flow Transitions (reduction/expansion)

Flow Transitions (reduction/expansion)

(OP)
I am in the process of developing a mixing stage for a process I am working on.  To minimize the overall length in the process flow direction, I have chosen to use mixing elements that are smaller in diameter than the upstream/downstream piping.  I am trying to determine a way to minimize the effect of the flow stream reduction/expansion with the use of baffles (I really want, again, to minimize the overall length required for this unit operation).  Has anyone ever seen any information related to the sizing/placement/design of baffles to help in distributing the flow at the stepped inlet and outlet of the mixing stage (6" to 3" to 6")?  I cannot afford the length required by a "perfect" reducer geometry on both ends of the mixing stage.

rjw57

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